Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
than cua » nhan cua, thai cua, gian cua
nang xa » nang x, lang xa, nang ma
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
ban cua » ban quan
dai ky » dan ky, dai ly, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: sau dai ky nang xa hoi. hieu qua ((cam duc) or (cao duc)) van hanh ((than cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: sau dai ky nang xa hoi. hieu qua ((cam duc) OR (cao duc)) van hanh ((than cua) OR (ban cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "sau dai ky nang xa hoi. hieu qua ((cam duc) or (cao duc)) van hanh ((than cua) OR (ban cua)) tre".
• Adding a wildcard symbol may retrieve word variants: sau dai ky nang xa hoi. hieu qua ((cam duc) or (cao duc)) van hanh ((than cua) OR (ban cua)) tre*.